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11. f4
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Now the Nh5 is threatened. |

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11... Nf6
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Black retreats. |

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12. Nxf6+
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White exchanges, the Bd2 is going to c3 after all. |

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12... Qxf6
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black recaptures. |

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13. Bc3
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.....and it reaches the square. Just contrast the scope of the dark square bishops. On c3 white's has a lovely diagonal, while on b6 Black's has very limited scope. |

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13... Qe7
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Black's queen supports the weak d6 square. |

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14. Bd3
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White carries on with his development, if black doesn't defend accurately, white can launch a king side attack in some variations. |
2 comments
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14... f5
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Black is awake to the threats, but just compare the development of both sides, |
1 comment
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15. Qh5
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Although I played this move, I am not sure that it is best. Maybe just 0-0 is best. |

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15... Nc6
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Black starts to catch up on development now. |

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16. O-O
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White finally castles. |
1 comment
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16... Ba5
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And now black, aware of the power of the white bishop on c3, seems to go to exchange it. |

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17. Rac1
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So white makes sure that his pawns are not doubled when the exchange comes in. |

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17... Bd8
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I really don't understand this move. By moving to a5 first, black has just lost a move. In the post-match analysis, the Gameknot computer also criticised this move. It gave as the best follow up for both sides, Bd8 17. Ng5 h6 18. Nf3 Rb8 19. Rcd1 d6 20. Rf2 Qf7 21. Qxf7+ Kxf7 22. e4 Ba5 23. Bxa5 Nxa5 24. exf5. It also says as best for black Bxc3 17. Rxc3 Rb8 18. Rc2 g6 19. Qf3 a5 20. Rd2 Bb7 21. Qd1 d5 22. Ng5 h6 23. Nf3 Kg7. Well of course, I didn't see all that, but I thought the exchange on c3 was best for black, and would have given approximate equality. White is now slightly better (0.95 better according to the Gameknot computer)
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18. e4
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As white is better developed, it makes sense to open up the position, maybe launch a king side attack, if conditions are right. |

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18... g6
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Black is alert to the risks in his position, and gives extra protection to f5, while attacking the white queen. |

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19. Qh6
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Now there are threats of moves like Ng5, R-f3-h3. |

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19... Nd4
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Black is alert again, and reduces white's attacking chances, but at the cost of a doubled d pawn. |

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20. exf5
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Maybe it was better to take on d4 first? |

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20... exf5
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Black recaptures. |

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